Anchor-bolt shell.



H. ROSENBERG.

ANCHOR BOLT SHELL.

APfLIoA'rIoN FILED JAN.z6,1914.

` 1,099,668. dPatented June 9,1914.

fawn/rey f' UNITED sTATEsl PATENT oEEIoE;

HEYMAN ROSENBE'RG. or.. NEW YORK, N. Y., AssisNon To PARKER SUPPLY comm or NEW YORK, N. Y., A CORPORATION OF NEW YORK.

ANCHOR-noti.' SHELL.

Specification of Letters Patent. Application mea January 2e, v1914. srial No. 814,497.

To au 'whom it may concern Be it *knownethatl I, HEYMAN RosENERs, I

a citizen of the United States of America, residing at` New York city, borough ofManhattan, co'unty and State of New York, have invented certain new and useful Improvements' in AnchorBoltShells, of which the following is a full., clear, and exact description. l

This invention relates to .an improvement in expansion-boltshells, the object being to provide an article Vof this nature'by whichv means an object can be secured to a support by simply boring a hole in thev support and insert-ing the expansible shell Of the bolt and then inserting a wood or machine-screw.

` ting of the thread I place in the bore of the shell aI pluralityof projections, preferably l independent and separated one4 from' the other, the said projections acting as a portion of a female thread which the threads of the screws willengagewhen the said screws are inserted and before the vsaid screws are rotated-t0 cut their own thread. The projections act to prevent the inserted screw from backing off when it is rotated.

Further lfeatures of improvement will hereinafterappear; 4

I will now proceed to describe my`invention in detail, summarizing its lessential features in the appended claims, reference being had to the accompanying drawing, wherein: v

Figure 1 is a longitudinal sectional view of my improved anchor-bolt-shell, in position in asupport; Fig. 2 is a detail'elevation of theshell; Fig. 3 is an enlarged end view thereof; Fig. 4 is a cross-sectional view, the section being taken on a line 4-4 inv Fig. 5; and Fig. 5 is a detail sectional plan view of the shell, thesection bej ing taken on a line 5-5 in Fig. 3,the screw being shown in elevat-ion.

As herein illustrated my improvement consists of a shellv 1 of relatively soft material slotted asat 2 for the greater part of its length, the said shell having a bore 3 extending from end to end; the said bore being tapered and having a wall hexagonal in shape, whereby fiat surfaces are provided. At intervals within the bore 3 I place pro- ;.jections 5 and (l which are made integral wlth the shelland extend across the slotsg;

Patented June 9, 1914.

.that is to say, each slot 2 is crossed by a pro; .i

jection. The projections 5 and 6 hold the shell from expanding, but are .adapted to y break when t e shell is expanded by the i screw 7. The projectio' s 5'andu6 also act to prevent the screw from. backing off when said screw is rotated, fo'r the reason y f that the said projectionsvvvill engage the 'thread of the -screw (see-Fig'. `5.) wh'n the screw is Vinserted in th'eshell and artly rotated. I When the screw is rotated the projections 5 and 6 will act in the nature ofa n'ut and i cause the screw to travel inwardly. As the screw Atravelsinwardly the thread 8 vwill i cut into the .fiat surfaces 4 and hence the i bore ofthe shell will be tapped', and the screw will 4finally be firmly..l1eld by the shell.

expand and the projections willbreak (see dotted lines 9,l Fig. l). The projections 5 and 6 are placed in the shell for the purpose of preventlng the screw from backing oft' material of' tlie shell. The projections are will'break after a little strain is placed thereupon by the inwardlyrtraveling screw.

shell 1 with exterior oppositely disposed teeth or projections 10. The teeth or projections lOwill dig into thewallof the opening l1 of the Support 12, when the shell is expanded.

provide .a surface into which the thread 8 will easily cut. To take care of the taper of the screw I preferably make the innermost 'projection v6 somewhat longer than the projection 5.

Having now detail what I claim and desire to secure by Letters Patent is:

l. An exp nsion bolt shell which is longitudinally sp it for the greater part of its length provided with a tapered bore and havingat intervals discontinuous frangible projections adapted to engage the threads of an expanding screw.

Q. An expansion bolt shell consisting of a i bodyeportion slotted longitudinally through- As the screw travels inwardly, the shell will and thus cause it 4to cut its way .intothe made comparatively thin in order that the)r To prevent the shell from rotating while the screw 7 is being rotated,`I provide theV The hexagonal wallof the bore of the shell described my invention in vided with a tapered bore, and projections within said bore and crossing said slots adapted to engage the thread of a screw.

3. An expansion bolt shell consisting of a lbody portion slotted longitudinally throughout the'greater part of its length and provided with a tapered bore, and fran'gible projections within said' bore and crossing said slots adapted to engage the threads of a screw.

4. An expansion bolt shell consisting-of a body portion slotted longitudinally for the greater part of its length' and provided with a tapered bore having an angular-ly shaped Wall, frangible projections within said bore and crossing said slots adapted to engage lthe threadso a screw'.

' 5. An expansion bolt shell consisting of an eXpansible body of relatively soft material having a tapered bore, and frangible projections Within said bore and Crossing said slots adapted to engage the thread of a screw, said proJections being integral with said shell.

6. An expansion-bolt shell divided into a s. An anchor-boit Shen divided into a piu.V

rality of members by-longitudinal slots and provided 'with breakable integral parts crossing the said slots and connectingv said members across all of said slots.

9. -An anchorbolt shell divided into a pluralty of members by longitudinal slots and provided with breakable parts Which cross the slots, connect said members on the inner face of. the shell and are adapted to. engagev the threads of a screw, inserted in said shell. Signed at New York city, N. Y. this 20 day of January 1914:.

HEYMAN ROSENBERG.

lVitnesses:

EDWARD A. J ARvIs, MAURICE BLOCK. 

